Gas Tuner/Monitor - 50 State Legal. The Edge Evolution CS2 is the perfect budget-minded performance tuner and monitor for Ford F-150, Chevy Silverado, Ram HEMI trucks, and popular SUVs like the Expedition, Tahoe, and Escalade. Combining proven flash tuning with a compact digital display, the Evolution CS2 delivers safe, 50-state emissions-compliant power gains designed to improve horsepower, torque, fuel economy, and drivability. With preloaded tuning levels optimized for daily driving, towing, fuel savings, and performance, the CS2 gives gas truck and SUV owners the flexibility to tune their vehicle to match their needs. Simple to install and easy to use, the Evolution CS2 plugs into your factory OBD-II port to quickly reflash the ECM. Once your calibration is set, you can unplug the.